That's where networking effects come in, and what the community needs to build. Even people who hate facebook and twitter eventually join just because their friends are on there. If bitcoin starts being accepted everywhere, even SomethingAwfull goons will have no choice but to embrace it.
Have a look at Red's post. It's a good post that details the problem.
You think Tenebrix was unfair with 7M premined coins? Well, try Bitcoin that in about a year will have 50% premined. A tiny minority controls 50% of all coins, leaving the rest of the world to split the rest. If the rich minority stop mining, which they won't do. Try to get acceptance for that system from those who believe that the current elite have a too big share of the wealth.
If we sit on our coins doing nothing, they aren't worth anything. If we use them and spend them, they will keep getting distributed through the rest of society. OP's claims could have also been applied to Google stock (or any stock, really), yet people still buy. Those same people can be just as ignorant about bitcoin as they have been about stocks.
Besides, considering the concentration of USD, I'd think people would be used to bitcoin.